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Sagot :

Bonsoir,

Simplifier :

Double distributivité : (a + b)(c + d) = ac + ad + bc + bd

A = 2x² + 12x + (x - 3)(5x - 1) - 1

A = 2x² + 12x + 5x² - x - 15x + 3 - 1

A = 7x² - 4x + 3 - 1

A = 7x² - 4x + 2 ✅️

Bonne soirée.

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